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目的探讨头发消化方法对钙、镁、铜、铁、锌、锰元素测定的影响。方法分别使用2种不同湿消化法和微波消解法进行前处理,并采用火焰原子吸收光谱测定头发中的钙、镁、铜、铁、锌、锰含量。结果 3种方法处理后所测各元素含量结果差异均无统计学意义(P>0.05),且用微波消解法处理后所测含量结果相对偏差较小,3种方法的加标回收率分别在91.7%～104.1%之间,精密度试验的相对标准偏差均<5%。结论采用3种方法都可取得相对准确的测定结果,但是微波消解法操作简单、省时、试剂用量少、样品污染少,是较理想的消化方法。
Objective To investigate the effect of hair digestion method on the determination of calcium, magnesium, copper, iron, zinc and manganese. Methods Two different methods of wet digestion and microwave digestion were used for pretreatment. The contents of calcium, magnesium, copper, iron, zinc and manganese in the hair were determined by flame atomic absorption spectrometry. Results There was no significant difference in the contents of all the tested elements after the three treatments (P> 0.05), and the results showed that the relative deviation was small after the microwave digestion. The recoveries of the three methods were 91.7% ~ 104.1%, the relative standard deviation of precision test were <5%. Conclusion All the three methods can obtain relatively accurate determination results. However, the microwave digestion method is simple, time-saving, less reagent consumption, less sample contamination, is an ideal method of digestion.